* certreqgen.c (get_parameter_uint, create_request): Create
an extension for key usage when requested.
* gpgsm.c (main): Install emergency_cleanup also as an atexit
handler.
* verify.c (gpgsm_verify): Removed the separate error code
handling for KSBA. We use shared error codes anyway.
* export.c (export_p12): Removed debugging code.
* encrypt.c (gpgsm_encrypt): Put the session key in to secure memory.